I had some problems in the past when I made some stupid mistakes and got some stupid cards, but I learned a lot from this, and I know now how to calm myself down.
There are a lot of people who don't trust in me, so I just try to make them wrong.
My job is to score goals.
I want to show I can control my emotion and aggression and stay calm.
That is my style of play, my strength: hold up, playing with my back to goal.
I have followed Newcastle my whole life. I had two Newcastle shirts when I was little. It was unusual; most people choose a team like Manchester United or Barcelona, but for me, it has always been Newcastle.
I've been happy from the start at Newcastle. It has been my favourite club ever since I was small boy in Serbia.
At all big clubs, there is pressure. They all want to win and expect to win.
That's the Serbian way. That's the way we approach things, especially in sport. We are a small country, but if we want something, we will fight for it. It's maybe part of the history of the country; it's just our mentality. We are small but strong.
The Serbian people are very kind. Sometimes life is ruthless, and you have to show character. But come to Serbia and see how friendly everyone is; then you'll change your mind.
Of course defenders will try to provoke me - that is their job.
I was small until I was 15, then grew about 12 inches in a year and built up my strength in the gym.
I could have gone down a very different path, but my parents would not let me give up football.
I am always in the box, strong, good in the air, and, of course, I like getting stuck in. I play a physical game.
I've picked up a few scars during games.
I am a typical No 9.
I try to learn every day and train as hard as I can.
Sometimes, you have tough times when you don't score goals, but the most important thing is to keep working hard.
When I first signed for Newcastle, I was still a boy.
My father tells me I would have been a criminal or a kick-boxer. But fatherhood has changed me - a lot.
